(one's) little finger told (one) that(redirected from his little finger told him that)
(one's) little finger told (one) that
A phrase used when the speaker has learned something by unconventional means. Pain in one's fingers was once regarded as an indicator of things to come. Oh dear, I just knew that they were going to break up this weekend—my little finger told me that.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.